ClassPathConfigSource


1   /*
2    * Copyright (C) 2005 Alfresco, Inc.
3    *
4    * Licensed under the Mozilla Public License version 1.1 
5    * with a permitted attribution clause. You may obtain a
6    * copy of the License at
7    *
8    *   http://www.alfresco.org/legal/license.txt
9    *
10   * Unless required by applicable law or agreed to in writing,
11   * software distributed under the License is distributed on an
12   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific
14   * language governing permissions and limitations under the
15   * License.
16   */
17  package org.alfresco.config.source;
18  
19  import java.io.InputStream  ;
20  import java.util.Collections  ;
21  import java.util.List  ;
22  
23  import org.apache.commons.logging.Log;
24  import org.apache.commons.logging.LogFactory;
25  
26  /**
27   * ConfigSource implementation that gets its data via the class path.
28   * 
29   * @author gavinc
30   */
31  public class ClassPathConfigSource extends BaseConfigSource
32  {
33      private static Log logger = LogFactory.getLog(ClassPathConfigSource.class);
34      
35      /**
36       * Constructs a class path configuration source that uses a single file
37       * 
38       * @param classpath the classpath from which to get config
39       * 
40       * @see ClassPathConfigSource#ClassPathConfigSource(List<String>)
41       */
42      public ClassPathConfigSource(String   classpath)
43      {
44          this(Collections.singletonList(classpath));
45      }
46  
47      /**
48       * Constructs an ClassPathConfigSource using the list of classpath elements
49       * 
50       * @param source List of classpath resources to get config from
51       */
52      public ClassPathConfigSource(List  <String  > sourceStrings)
53      {
54          super(sourceStrings);
55      }
56  
57      /**
58       * Retrieves an input stream for the given class path source
59       * 
60       * @param sourceString The class path resource to search for
61       * @return The input stream
62       */
63      public InputStream   getInputStream(String   sourceString)
64      {
65          InputStream   is = this.getClass().getClassLoader().getResourceAsStream(sourceString);
66  
67          if (is == null && logger.isDebugEnabled())
68          {
69              logger.debug("Failed to obtain input stream to classpath: " + sourceString);
70          }
71  
72          return is;
73      }
74  }
75
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